I need to know how to change shipping on my form i have a box that states pickup or delivery. i want the shipping only when they say delivery.

 i want the shipping only when they say delivery. 

You can use form conditions to hide/show the address field based on the selection in the drop-down.

Here is a clone of your form with the condition applied for your evaluation.

http://www.jotformpro.com/form/52462220519954